In this paper, the intensive surface observations data in Gansu in the Qilian Mountains were utilized to objectively assess the precipitation data from Global Precipitation Measurement(GPM) using Threat Scores(TS), Consistency Indices(CI)and Critical Success Index(CSI). The results show that: (1) the GPM data can characterize the main spatial distribution of precipitation in different seasons in the Qilian mountains, and at the same time, the data underestimates the amount of light precipitation areas and overestimates the amount of heavy precipitation areas; (2) the observation data shows that the Qilian Mountains has the highest frequency of forming light rain, which is 85.95%, and the frequencies of medium rain, heavy rain and torrential rain are less frequent, which are 12.04%, 1.89% and 0.1%, respectively; the GPM data detection results are consistent with the observations; (3) the GPM precipitation data can capture the diurnal variations of precipitation in summer and autumn, which is concentrated in the morning and nighttime, but performs poorly in characterizing winter precipitation diurnal cycles. Overall, GPM precipitation data can effectively characterize precipitation features under complex terrain in the Qilian Mountains.
利用常用的检验数值预报格点数据的方法TS评分[27]对数据的准确性评估。将GPM格点资料看作一种模式预报结果,根据祁连山山区的降水特征按照阈值(0.1、5、10、20 mm/d)进行TS评分。利用一致性指数IA[28](Index of Agreement)、均方根误差RMSE(Root Mean Square Error)、偏差Bias、探测率POD(Probability of Detection)、误报率FAR(False Alarm Ratio)和临界成功指数CSI(Critical Success Index)评估GPM降水格点资料对祁连山地区降水特征的表征效果。TS评分的计算公式如下:
LIYanying, ZHANGQang, XUXia,et al.Relationship between precipitation and terrain over the Qilian Mountains and their ambient areas[J].Journal of Glaciology and Geocryology,2010,32(1):52-61.(in Chinese)
CHANGXuexiang, ZHAOAifen, WANGJinye,et al.Precipitation characteristic and interception of forest in Qilian Mountain[J].Plateau Meteorology,2002,21(3):274-280.(in Chinese)
[5]
汤懋苍.祁连山区天气的日变化[J].地理学报,1963,29(3):197-206.
[6]
TANGMaocang.Diurnal variation of weather in Qilian Mountain region[J].Acta Geographica Sinica,1963,29(3):197-206.(in Chinese)
ZHANGQiang, ZHANGJie, SUNGuowu,et al.Research on atmospheric water-vapor distribution over Qilianshan Mountains[J].Acta Meteorologica Sinica,2007,65(4):633-643.(in Chinese)
[9]
陈志昆.祁连山区近40α来降水特征研究[D].兰州:兰州大学,2012.
[10]
CHENZhikun.Study on characteristics of the precipitation in Qilian Mountains during recent 40 years[D].Lanzhou:Lanzhou University,2012.(in Chinese)
[11]
刘蓓.祁连山南麓夏季地形云特征及山谷风影响分析[J].气象科技,2016,44(1):67-75.
[12]
LIUBei.Diurnal changes of summer orographic clouds on southern slope of Qilian Mountains and impacts of mountain-valley breeze[J].Meteorological Science and Technology,2016,44(1):67-75.(in Chinese)
LIUXuemei, ZHANGMingjun, WANGShengjie,et al.Diurnal variation of summer precipitation and its influencing factors of the Qilian Mountains during 2008-2014[J].Acta Geographica Sinica,2016,71(5):754-767.(in Chinese)
BAIXiaoping, JINShuanglong, WANGShigong,et al.Spatio-temporal characteristics of the short-time heavy rainfall in the east of northwest China[J].Journal of Desert Research,2018,38(2):410-417.(in Chinese)
[17]
张强.西北地区冰雹监测、预警技术研究[R].兰州:甘肃省气象局,2009.ZHANG Qiang.Research on hail monitoring and early warning technology in Northwest China[R].Lanzhou:Gansu Provincial Meteorological Bureau,2009.(in Chinese)
CHENTianyu, LIZhaorong, CHENQian,et al.The analysis of climate characteristics of water vapor distribution over northwest China with water vapor field retrieved from GMS5 satellite data[J].Chinese Journal of Atmospheric Sciences,2005,29(6):864-871.(in Chinese)
BAILei, LILanhai, SHIChunxiang,et al.An overview of precipitation characteristics and its research progress in Tianshan Mountains Area,China[J].Journal of North China University of Water Resources and Electric Power (Natural Science Edition),2017,38(5):38-48.(in Chinese)
[22]
Skofronick-JacksonG, PetersenW A, BergW,et al.The global precipitation measurement (GPM) mission for science and society[J].Bulletin of the American Meteorological Society,2017,98(8):1679-1695.
[23]
HuffmanG J, BolvinD T, NelkinE J,et al.The TRMM multisatellite precipitation analysis (TMPA):quasi-global,multiyear,combined-sensor precipitation estimates at fine scales[J].Journal of Hydrometeorology,2007,8(1):38-55.
[24]
PradhanR K, MarkonisY, GodoyM R V,et al.Review of GPM IMERG performance:a global perspective[J].Remote Sensing of Environment,2022,268:112754.
[25]
TanJ, PetersenW A, TokayA.A novel approach to identify sources of errors in IMERG for GPM ground validation[J].Journal of Hydrometeorology,2016,17(9):2477-2491.
[26]
GaonaM F R, OvereemA, LeijnseH,et al.First-year evaluation of GPM rainfall over the Netherlands:IMERG day 1 final run (V03D)[J].Journal of Hydrometeorology,2016,17(11):2799-2814.
[27]
WangZ L, ZhongR D, LaiC G,et al.Evaluation of the GPM IMERG satellite-based precipitation products and the hydrological utility[J].Atmospheric Research,2017,196:151-163.
JINXiaolong, SHAOHua, ZHANGChi,et al.The applicability evaluation of three satellite products in Tianshan Mountains[J].Journal of Natural Resources,2016,31(12):2074-2085.(in Chinese)
WEIZhiming, YUEGuanyin, LIJia,et al.Comparison study on accuracies of precipitation data using GPM and TRMM product in Haihe River Basin[J].Bulletin of Soil and Water Conservation,2017,37(2):171-176.(in Chinese)
LIQilun, ZHANGWanchang, YILu,et al.Accuracy evaluation and comparison of GPM and TRMM precipitation product over China's mainland[J].Advances in Water Science,2018,29(3):303-313.(in Chinese)
[34]
XuR, TianF Q, YangL,et al.Ground validation of GPM IMERG and TRMM 3B42V7 rainfall products over southern Tibetan Plateau based on a high‐density rain gauge network[J].Journal of Geophysical Research:Atmospheres,2017,122(2):910-924.
QUXuebin, FUYanan, YUANXiuzhi,et al.Applicability analysis of GPM-IMERG daily precipitation data in Inner Mongolia[J].Torrential Rain and Disasters,2020,39(3):293-299.(in Chinese)
WANGSimeng, WANGDazhao, HUANGChang.Evaluating the applicability of GPM satellite precipitation data in Heihe River Basin[J].Journal of Natural Resources,2018,33(10):1847-1860.(in Chinese)
OUYANGLin, YANGKun, QINJun,et al.Advances and perspectives in precipitation research for Himalayan Mountains[J].Plateau Meteorology,2017,36(5):1165-1175.(in Chinese)
DINGYongjian, YEBaisheng, LIUShiyin.Impact of climate change on the alpine streamflow during the past 40 a in the middle part of the Qilian Mountains,northwestern China[J].Journal of Glaciology and Geocryology,2000,22(3):193-199.(in Chinese)
[43]
BhattacharyyaB K.Bicubic spline interpolation as a method for treatment of potential field data[J].Geophysics,1969,34(3):402-423.
HUANGMiaofen, XINGXufeng, ZHUQijiang,et al.Improvement of models for the estimation of downward atmospheric long-wave radiation for retrieving net radiation fluxes based on remote sensing[J].Geographical Research,2005,24(5):757-766.(in Chinese)
[48]
全国气象防灾减灾标准化技术委员会. 降水量等级:GB/T 28592-2012 [S].北京:中国标准出版社,2012:2-3.National Technical Committee on Meteorological Disaster Prevention and Mitigation of Standardization Administration of China.Grade of precipitation:GB/T 28592-2012 [S].Beijing:Standards Press of China,2012:2-3.(in Chinese)
FANGuangzhou, ShihuaLÜ.Numerical simulation study for the effect of terrain on north China summer precipitation[J].Plateau Meteorology,1999,18(4):659-667.(in Chinese)
[51]
孙继松.气流的垂直分布对地形雨落区的影响[J].高原气象,2005,24(1):62-69.
[52]
SUNJisong.The effects of vertical distribution of the lower level flow on precipitation location[J].Plateau Meteorology,2005,24(1):62-69.(in Chinese)